Erratically will not start or even turn over. Sometimes will start but a few seconds later dies. Next day will start and run fine. 3 Saturn dealers and an independant mechanic unable to find a problem with the battery or starter or anything else It is a 2001 Saturn SL2

Car starts then dies in a few seconds - CarGurus

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CarGurusFeb 3, 2014 - Engine turns over fine and starts, but stops in a second or 2. ... Good fuel pressure, starts, runs for about 7 seconds, dies after a sudden drop in fuel pressure. ...starts 15 minutes later, runs fine then stumbles and dies again 3 answers ... I drove carhome shut off and next morning would not start, but will turn ...

94 camry le 4cylinder starts when cold, shuts off .

You have a fusable link under the hood this is what i find for Saturn

Sounds like alternator/generator could be bad and also battery could be bad.

This engine is electronically controlled so the first thing that must be done here is to have the systems control computer tested for fault codes and then do the proper diagnostics based on those codes.

You didnt list the type of car this is, the most common thing that causes this is the starter, i just had a saturn, the customer had the same problem we told her it may be the starter but cant be 100% sure until it actted up, she didnt want to replace it unless we were sure, so we kept and drove the car around for 5 days and finally the last day it didnt start and it was the starter , same problem turn key and nothing no noise and no start, i would have the starter replaced and go from there, its a mater of time before the car just wont start,hope this is helpful.

pick up a new ecu from salvage somtimes they let em go cheep
also check the mass air sensor and all the wonderfull grounds
grounds are from bat to body bat to motor and motor to body
make sure there all conected and clean and tight

Check the gas it could be contaminated, Not to sould like a Wise guy but are you sude it 's not deisel fuel you put in.

the alarm is activating when he locks it and for some reason the key or fob isnt deactivating it..check the disarm switches in the door

I think your problem might be your fuel relay which is situated next to the fuse box in the engine compartment.

try changing the coil- sometimes they get hot and break down- once they cool off vehicle will start and run until they get hot again